The West has experienced three hundred years of unprecedented liberty, freedom, and social mobility. I was saying it appears to be ending, at least in the US.

I see what you are saying; but the point I was making is that only recently has that liberty been available (albeit in lesser measure) to woman and non-white men.

By all evidence, Liberty is an anomaly against nature. Natural Selection creates Plutocracy. Money is power, and the masses fail the Prisoner's Dilemma and are unable to work together against it, excepting rare charismatic leaders, most of whom immediately create another dictatorship after revolution anyway.

I'm not so certain. Economic exclusion is what enables power. I don't know whether or not technology will increase or decrease economic exclusion in the longer term. Technology is changing much too fast, and politics far too slow to make reliable projections at this time.

Human nature varies on scale, and it depends a lot on the possibilities of interaction, and how boundaries are drawn. Aside from the centralized administration of services like Uber and Airbnb, IMO they indicate positive possibilities for granular economic models.